Grand Junction, CO Climate

Summary Graph

The summary climate graph for Grand Junction, CO shows a selection of temperature, rainfall and snow minimum, mean and maximum measures over the course of a year. Click on each of the measures in the key to toggle them on and off.

Graph of average and extreme temperature ranges by day for Grand Junction, CO.


The warmest month in Grand Junction Regional, Grand Junction, Colorado is July with an average high temperature of 94.8°F. The hottest day on record was June 30 1979 when the temperature hit 109.9°F. During January the overnight temperature drops to an average of 15.9°F with the lowest temperature of -18.2°F being recorded on February 6 1989.

Warmest Days

Warmest Months

Coldest Days

Coldest Months

The warmest days on record are:

30 Jun 1979109.9°F
28 Jun 1990105.1°F
15 Jul 2002105.1°F
14 Jul 2003105.1°F
22 Jul 2005105.1°F

The warmest months on average were:

July 2003101°F
July 200299.3°F
July 200598.1°F
July 200797.9°F
July 200097.4°F

The coldest days on record are:

6 Feb 1989-18.2°F
24 Dec 1990-17°F
10 Dec 2009-16.1°F
8 Dec 1978-12.1°F
8 Jan 1973-11.2°F

The coldest months on average were:

January 19732°F
January 19883.8°F
February 19744.7°F
December 19786°F
December 20096.2°F


The wettest month in Grand Junction, CO is August with an average of 1.8 inches of rain falling on 8 to 9 days. The driest month by average rainfall in Grand Junction, CO is June with an average of 0.5 inches of rain falling on 5 to 6 days. Although in January it typically rains on less days with 0.8 inches falling in 2 to 3 days

Wettest Days

The wettest days on record are:

18 April 19735.5 inches
18 April 19751 inches
4 April 20090.8 inches
6 April 19930.8 inches
2 April 19940.8 inches

Wettest Months

The wettest months on record are:

April 197327.6 inches
February 197323.8 inches
August 198421 inches
July 198620.5 inches
March 197316.4 inches

Driest Months

The driest months on record are:

June 19800 inches
June 20030 inches
November 19890 inches
July 20030 inches
November 20070 inches